The Experts below are selected from a list of 63 Experts worldwide ranked by ideXlab platform
Gulaboski Rubin - One of the best experts on this subject based on the ideXlab platform.
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Theory of Square-wave Voltammetry of Diffusional Two-Step Mechanism Associated with Reversible Follow Up Chemical Step-SWV of Diffusional EECrev Mechanism
2021Co-Authors: Gulaboski RubinAbstract:Theory of electrochemical behavior of many hydrophilic physiological systems, whose electrode transformation takes place in two consecutive steps, additionally complicated by the reversible follow up chemical reaction to the final redox product, is presented under conditions of square-wave voltammetry. In this Mathcad File, we give entire simulation protocol for calculating square-wave voltammograms as function of potential of redox transformation, of standard rate constants of electron transfer of both electrode reactions, but also as a function of equilibrium constant and the rate of chemical follow up reaction. The model is relevant for many neurotransmitters (dopamine), quinone-like drugs and many hydrophilic redox enzymes, such as cytochrome C. Readers can get full benefit of the Mathcad File that can be incorporated for free for everyone in order to perform simulation
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Supplementary Mathcad File to work "Square‑wave voltammetry of two-step diffusional electrode mechanism coupled with a reversible follow‑up chemical reaction"
'Springer Science and Business Media LLC', 2021Co-Authors: Gulaboski Rubin, Mirceski ValentinAbstract:The supplementary Mathcad File of this item is related to the work "Square‑wave voltammetry of two-step diffusional electrode mechanism coupled with a reversible follow‑up chemical reaction" published in Journal of Solid State Electrochemistry in 2021 on the occasion of 75th birthday of professor Gyorgy Inzelt. The Mathcad File contains all simulation details in Square-wave voltammetry to simulate a two-step diffusional electrode mechanism in which the second electron transfer step is linked with reversible follow-up chemical reaction. With the simulation parameters given in this File, one can simulate various scenarios of separated and overlapped voltammetric peaks featuring same or different kinetics of electron transfer. In addition, one can get insight into the effect of chemical reaction to the features of both SWV peaks
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Square-wave Voltammetric Theory of Two-Step Surface Electrode Mechanism Associated with Intermediate Irreversible Regenerative Chemical Reaction-SWV of Surface ECatE mechanism
2021Co-Authors: Gulaboski RubinAbstract:For the first time, we present theoretical model of a two-step surface electrode mechanism, in which an irreversible regenerative chemical reaction is associated to the first electron transfer step. The abbreviation of this mechanism is "Surface ECatE mechanism". The model is solved under conditions of square-wave voltammetry (SWV). Model is relevant for many lipophilic redox enzymes, whose redox transformation takes place in two consecutive electron transfer steps. While we present several sets of specific voltammograms relevant to this mechanism, readers can explore the Mathcad File for free to simulate different conditions at such systems. Experimental systems are found in many quinone-containing redox enzymes, such as FAD enzymes involved in the oxidative phosphorylation mechanism
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Supplementary Mathcad File related to work: "Surface Electrode Mechanism Associated with Preceding and Follow up Chemical Reactions-Theoretical Analysis in Square-Wave Voltammetry" published in Croatica Chemica Acta
Hrvatsko Kemijsko Drustvo, 2021Co-Authors: Kokoskarova Pavlinka, Risafova Sonja, Gulaboski RubinAbstract:We give in this work a data set in a form of Mathcad working File, related to the recently published work "Surface Electrode Mechanism Associated with Preceding and Follow up Chemical Reactions-Theoretical Analysis in Square-Wave Voltammetry". The readers can implement the recurrent formula given in this data set in order to calculate various situations of surface CEC Mechanism that are closely related to activity of many redox enzymes
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Protein-film voltammetry of surface Ox(ads) + ne = Red(ads) mechanism: Simulation procedure in Square-wave voltammetry-A Mathcad File
2020Co-Authors: Gulaboski Rubin, Mirceski ValentinAbstract:Surface reaction Ox(ads) + ne- = Red(ads), in which both participants are firmly adsorbed at the working electrode surface is considered as an adequate model for many redox enzymes analyzed in protein-film voltammetry. We give the readers entire working Mathcad File to simulate this mechanism under conditions of square-wave voltammetry. The features of simulated voltammograms is function of number of exchanged electrons, electron transfer coefficient, potential step, square-wave amplitude, and on dimensionless parameter related to the kinetic of electron transfer lambda L, defined as L= ks/f, where ks is standard rate constant of electron transfer and ‘f’ is the SW frequency. Relevant thermodynamic and kinetic parameters of many lipophilic enzymes can be evaluated with this model, which can be of help for scientists working in protein-film voltammetry
Mirceski Valentin - One of the best experts on this subject based on the ideXlab platform.
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Supplementary Mathcad File to work "Square‑wave voltammetry of two-step diffusional electrode mechanism coupled with a reversible follow‑up chemical reaction"
'Springer Science and Business Media LLC', 2021Co-Authors: Gulaboski Rubin, Mirceski ValentinAbstract:The supplementary Mathcad File of this item is related to the work "Square‑wave voltammetry of two-step diffusional electrode mechanism coupled with a reversible follow‑up chemical reaction" published in Journal of Solid State Electrochemistry in 2021 on the occasion of 75th birthday of professor Gyorgy Inzelt. The Mathcad File contains all simulation details in Square-wave voltammetry to simulate a two-step diffusional electrode mechanism in which the second electron transfer step is linked with reversible follow-up chemical reaction. With the simulation parameters given in this File, one can simulate various scenarios of separated and overlapped voltammetric peaks featuring same or different kinetics of electron transfer. In addition, one can get insight into the effect of chemical reaction to the features of both SWV peaks
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Protein-film voltammetry of surface Ox(ads) + ne = Red(ads) mechanism: Simulation procedure in Square-wave voltammetry-A Mathcad File
2020Co-Authors: Gulaboski Rubin, Mirceski ValentinAbstract:Surface reaction Ox(ads) + ne- = Red(ads), in which both participants are firmly adsorbed at the working electrode surface is considered as an adequate model for many redox enzymes analyzed in protein-film voltammetry. We give the readers entire working Mathcad File to simulate this mechanism under conditions of square-wave voltammetry. The features of simulated voltammograms is function of number of exchanged electrons, electron transfer coefficient, potential step, square-wave amplitude, and on dimensionless parameter related to the kinetic of electron transfer lambda L, defined as L= ks/f, where ks is standard rate constant of electron transfer and ‘f’ is the SW frequency. Relevant thermodynamic and kinetic parameters of many lipophilic enzymes can be evaluated with this model, which can be of help for scientists working in protein-film voltammetry
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Cyclic Voltammetry Simulation Protocol for surface Ox(ads) + ne = Red(ads) mechanism in protein-film voltammetry: A Mathcad File for calculations
2020Co-Authors: Gulaboski Rubin, Mirceski ValentinAbstract:Reaction of protein-film voltammetry Ox(ads) + ne- = Red(ads), in which both participants are firmly adsorbed at the working electrode surface is considered cyclic voltammetry. This model is analogue of a surface simple electrode mechanism. We give the readers entire working Mathcad File to simulate this mechanism under conditions of cyclic voltammetry. The features of simulated voltammograms is function of number of exchanged electrons, electron transfer coefficient, potential step, and on dimensionless parameter related to the kinetic of electron transfer, defined as KI= ks x t, where ks is standard rate constant of electron transfer and ‘t is the time duration of potential step in cyclic voltammetry
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Simulation of Ox + ne = Red diffusional mechanism in Square-wave voltammetry-Mathcad File
2020Co-Authors: Gulaboski Rubin, Mirceski ValentinAbstract:Electrode transformation of many metal ions, drugs, and physiologically relevant compounds from water solutions is kinetically controlled process that take place via diffusion. If all participants in the electrode mechanism are present as dissolved species, and if there is no adsorption or associated chemical equilibria, their electrode transformation can be described with Ox + ne- = Red reaction scheme. We provide the readers a full Mathcad File in square-wave voltammetry for simulation of such electrode systems
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Cathodic stripping mechanism of first order associated with adsorption of the reacting ligand-Mathcad File for simulation in Cyclic Voltammetry
2020Co-Authors: Gulaboski Rubin, Mirceski ValentinAbstract:Electrode stripping mechanism of many drugs or other molecules, is often coupled with adsorption of the ligand molecules (drugs). If this happens, and if the reaction is of first order, we must consider adsorption equilibrium in the cathodic stripping mechanism. In such scenario, we can solve mathematically a model in which equilibrium constant of adsorption can be determined, as well as the parameters related to the electron transfer step. We provide in this work entire Mathcad File in cyclic staircase voltammetry that can be used to simulate this complex mechanism. All simulation parameters, and the potential ramp parameters are given in the File that is ready for simulation, free for everyone
Kokoskarova Pavlinka - One of the best experts on this subject based on the ideXlab platform.
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Supplementary Mathcad File related to work: "Surface Electrode Mechanism Associated with Preceding and Follow up Chemical Reactions-Theoretical Analysis in Square-Wave Voltammetry" published in Croatica Chemica Acta
Hrvatsko Kemijsko Drustvo, 2021Co-Authors: Kokoskarova Pavlinka, Risafova Sonja, Gulaboski RubinAbstract:We give in this work a data set in a form of Mathcad working File, related to the recently published work "Surface Electrode Mechanism Associated with Preceding and Follow up Chemical Reactions-Theoretical Analysis in Square-Wave Voltammetry". The readers can implement the recurrent formula given in this data set in order to calculate various situations of surface CEC Mechanism that are closely related to activity of many redox enzymes
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Additional Supplementary Material (Mathcad simulation Dataset) related to work published in Electroanalysis: Square‐wave Voltammetry of Two‐step Surface Electrode Mechanisms Coupled with Chemical Reactions – A Theoretical Overview
'Wiley', 2019Co-Authors: Janeva Milkica, Kokoskarova Pavlinka, Maksimova Viktorija, Gulaboski RubinAbstract:A challenging situation in all two-step surface mechanisms exists when both electron transfer steps take place at same potential. We provide in this work a data set for Mathcad simulations of a surface protein-film voltammetry of EECreversible mechanism, with two electron transfer steps (EE) happening at same potential. With adjusting the rate of coupled chemical reaction, we can achieve successful separation of both electron transfer steps. This is because the rate of chemical step will displace the second electron transfer step towards more positive potential, while first process remains unaffected. The reported methodology in the Mathcad File is the first approach in any voltammetric technique that enables recognition of a successive two-step mechanism when both electron transfers occur at same potential
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Supplementary Material related to paper: Protein‐film Voltammetry of Two‐step Electrode Enzymatic Reactions Coupled with an Irreversible Chemical Reaction of a Final Product – A Theoretical Study in Square‐wave Voltammetry (Electroanalysis April 2019
'Wiley', 2019Co-Authors: Kokoskarova Pavlinka, Janeva Milkica, Maksimova Viktorija, Gulaboski RubinAbstract:We provide the readers a full Mathcad File for simulating the surface EECirr mechanism under conditions of square-wave voltammetry. Everyone can use the stuff described in this File in order to make own simulations on reported protein-film mechanism. Redox mechanism we consider is one in which a consecutive two‐step electrode transformation occurs, and the product generated in the second electrochemical step at the electrode surface is coupled to a follow‐up irreversible chemical reaction, is theoretically considered under conditions of square‐wave voltammetry. The electrochemical description of considered systems is a “surface EECirr mechanism”. We point out several simple features that allow kinetic characterization of studied mechanism from time‐independent experiments at constant scan rate. Kinetics of interactions of many important enzyme-substrate systems can be studied with help of this mechanism
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Supplementary material to paper: Square‐wave Voltammetry of Two‐step Surface Electrode Mechanisms Coupled with Chemical Reactions – A Theoretical Overview (published in Electroanalysis August 2019)
'Wiley', 2019Co-Authors: Janeva Milkica, Kokoskarova Pavlinka, Maksimova Viktorija, Gulaboski RubinAbstract:We give in this work the entire Mathcad File for the two-step surface EECrev mechanism simulated under conditions of square-wave voltammetry. Square‐wave voltammetry (SWV) of so‐called “surface redox reactions” is seen as a simple and efficient tool to quantify large number of drugs, physiologically active substances and other important chemicals. In the referred work, we focus on theoretical SWV features of four complex surface electrode mechanisms, in which the electron exchange between the working electrode and the studied redox substrate takes place in two successive steps. While we present large number of calculated square‐wave voltammograms, we give hints to recognize particular two‐step surface mechanism, but also to distinguish it from other similar mechanisms. We present plenty of relevant aspects of surface two‐step surface EE, two‐step surface ECE and surface catalytic EEC’ mechanisms. Moreover, we present for the first time a series of theoretical results related to two‐step surface EECrev mechanism (i. e. two‐step surface reaction coupled to follow‐up reversible chemical step). Everyone can use this File for free in order to make simulations on referred mechanism
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Supplementary material (related to work): Theoretical Aspects of a Surface Electrode Reaction Coupled with Preceding and Regenerative Chemical Steps: Square‐wave Voltammetry of a Surface CEC’ Mechanism (published in Electroanalysis 2019)
'Wiley', 2019Co-Authors: Kokoskarova Pavlinka, Gulaboski RubinAbstract:In this data set, we give the entire Mathcad File related to the surface CEC' mechanism in Square-wave voltammetry. The model is solved for the first time under voltammetric conditions. In described work, we focus on the application of square‐wave voltammetry (SWV) to study the theoretical features of a surface electrode reaction coupled with two chemical steps. The starting electroactive form Ox(ads) in this mechanism gets initially generated via preceding chemical reaction. After undergoing redox transformation at the working electrode, Ox(ads) species got additionally regenerated via chemical reaction of electrochemically generated product Red(ads) with a given substrate Y. The theory of this so‐called surface CEC’ mechanism is presented for the first time under conditions of square‐wave voltammetry. While we present plenty of calculated voltammograms of this complex electrode mechanism, we focus on the effect of rate of regenerative (catalytic) step to simulated voltammograms. We consider both, electrochemical reactions featuring moderate and fast electron transfer. The obtained voltammetric patterns are very specific, having sometime hybrid‐like features of voltammograms as typical for CE, EC and EC’ mechanisms. We give diagnostic criteria to recognize this complex mechanism in SWV, but we also present hints to access the kinetic and thermodynamic parameters relevant to both chemical steps, and the electrochemical reaction, too. Indeed, the results presented in this work can help experimentalists to design proper experiments to study chemical features of important lipophilic systems
Janeva Milkica - One of the best experts on this subject based on the ideXlab platform.
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Additional Supplementary Material (Mathcad simulation Dataset) related to work published in Electroanalysis: Square‐wave Voltammetry of Two‐step Surface Electrode Mechanisms Coupled with Chemical Reactions – A Theoretical Overview
'Wiley', 2019Co-Authors: Janeva Milkica, Kokoskarova Pavlinka, Maksimova Viktorija, Gulaboski RubinAbstract:A challenging situation in all two-step surface mechanisms exists when both electron transfer steps take place at same potential. We provide in this work a data set for Mathcad simulations of a surface protein-film voltammetry of EECreversible mechanism, with two electron transfer steps (EE) happening at same potential. With adjusting the rate of coupled chemical reaction, we can achieve successful separation of both electron transfer steps. This is because the rate of chemical step will displace the second electron transfer step towards more positive potential, while first process remains unaffected. The reported methodology in the Mathcad File is the first approach in any voltammetric technique that enables recognition of a successive two-step mechanism when both electron transfers occur at same potential
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Supplementary Material related to paper: Protein‐film Voltammetry of Two‐step Electrode Enzymatic Reactions Coupled with an Irreversible Chemical Reaction of a Final Product – A Theoretical Study in Square‐wave Voltammetry (Electroanalysis April 2019
'Wiley', 2019Co-Authors: Kokoskarova Pavlinka, Janeva Milkica, Maksimova Viktorija, Gulaboski RubinAbstract:We provide the readers a full Mathcad File for simulating the surface EECirr mechanism under conditions of square-wave voltammetry. Everyone can use the stuff described in this File in order to make own simulations on reported protein-film mechanism. Redox mechanism we consider is one in which a consecutive two‐step electrode transformation occurs, and the product generated in the second electrochemical step at the electrode surface is coupled to a follow‐up irreversible chemical reaction, is theoretically considered under conditions of square‐wave voltammetry. The electrochemical description of considered systems is a “surface EECirr mechanism”. We point out several simple features that allow kinetic characterization of studied mechanism from time‐independent experiments at constant scan rate. Kinetics of interactions of many important enzyme-substrate systems can be studied with help of this mechanism
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Supplementary material to paper: Square‐wave Voltammetry of Two‐step Surface Electrode Mechanisms Coupled with Chemical Reactions – A Theoretical Overview (published in Electroanalysis August 2019)
'Wiley', 2019Co-Authors: Janeva Milkica, Kokoskarova Pavlinka, Maksimova Viktorija, Gulaboski RubinAbstract:We give in this work the entire Mathcad File for the two-step surface EECrev mechanism simulated under conditions of square-wave voltammetry. Square‐wave voltammetry (SWV) of so‐called “surface redox reactions” is seen as a simple and efficient tool to quantify large number of drugs, physiologically active substances and other important chemicals. In the referred work, we focus on theoretical SWV features of four complex surface electrode mechanisms, in which the electron exchange between the working electrode and the studied redox substrate takes place in two successive steps. While we present large number of calculated square‐wave voltammograms, we give hints to recognize particular two‐step surface mechanism, but also to distinguish it from other similar mechanisms. We present plenty of relevant aspects of surface two‐step surface EE, two‐step surface ECE and surface catalytic EEC’ mechanisms. Moreover, we present for the first time a series of theoretical results related to two‐step surface EECrev mechanism (i. e. two‐step surface reaction coupled to follow‐up reversible chemical step). Everyone can use this File for free in order to make simulations on referred mechanism
Maksimova Viktorija - One of the best experts on this subject based on the ideXlab platform.
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Additional Supplementary Material (Mathcad simulation Dataset) related to work published in Electroanalysis: Square‐wave Voltammetry of Two‐step Surface Electrode Mechanisms Coupled with Chemical Reactions – A Theoretical Overview
'Wiley', 2019Co-Authors: Janeva Milkica, Kokoskarova Pavlinka, Maksimova Viktorija, Gulaboski RubinAbstract:A challenging situation in all two-step surface mechanisms exists when both electron transfer steps take place at same potential. We provide in this work a data set for Mathcad simulations of a surface protein-film voltammetry of EECreversible mechanism, with two electron transfer steps (EE) happening at same potential. With adjusting the rate of coupled chemical reaction, we can achieve successful separation of both electron transfer steps. This is because the rate of chemical step will displace the second electron transfer step towards more positive potential, while first process remains unaffected. The reported methodology in the Mathcad File is the first approach in any voltammetric technique that enables recognition of a successive two-step mechanism when both electron transfers occur at same potential
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Supplementary Material related to paper: Protein‐film Voltammetry of Two‐step Electrode Enzymatic Reactions Coupled with an Irreversible Chemical Reaction of a Final Product – A Theoretical Study in Square‐wave Voltammetry (Electroanalysis April 2019
'Wiley', 2019Co-Authors: Kokoskarova Pavlinka, Janeva Milkica, Maksimova Viktorija, Gulaboski RubinAbstract:We provide the readers a full Mathcad File for simulating the surface EECirr mechanism under conditions of square-wave voltammetry. Everyone can use the stuff described in this File in order to make own simulations on reported protein-film mechanism. Redox mechanism we consider is one in which a consecutive two‐step electrode transformation occurs, and the product generated in the second electrochemical step at the electrode surface is coupled to a follow‐up irreversible chemical reaction, is theoretically considered under conditions of square‐wave voltammetry. The electrochemical description of considered systems is a “surface EECirr mechanism”. We point out several simple features that allow kinetic characterization of studied mechanism from time‐independent experiments at constant scan rate. Kinetics of interactions of many important enzyme-substrate systems can be studied with help of this mechanism
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Supplementary material to paper: Square‐wave Voltammetry of Two‐step Surface Electrode Mechanisms Coupled with Chemical Reactions – A Theoretical Overview (published in Electroanalysis August 2019)
'Wiley', 2019Co-Authors: Janeva Milkica, Kokoskarova Pavlinka, Maksimova Viktorija, Gulaboski RubinAbstract:We give in this work the entire Mathcad File for the two-step surface EECrev mechanism simulated under conditions of square-wave voltammetry. Square‐wave voltammetry (SWV) of so‐called “surface redox reactions” is seen as a simple and efficient tool to quantify large number of drugs, physiologically active substances and other important chemicals. In the referred work, we focus on theoretical SWV features of four complex surface electrode mechanisms, in which the electron exchange between the working electrode and the studied redox substrate takes place in two successive steps. While we present large number of calculated square‐wave voltammograms, we give hints to recognize particular two‐step surface mechanism, but also to distinguish it from other similar mechanisms. We present plenty of relevant aspects of surface two‐step surface EE, two‐step surface ECE and surface catalytic EEC’ mechanisms. Moreover, we present for the first time a series of theoretical results related to two‐step surface EECrev mechanism (i. e. two‐step surface reaction coupled to follow‐up reversible chemical step). Everyone can use this File for free in order to make simulations on referred mechanism